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shm: disable fallocate optimization if not supported

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shm.c:301:26: error: implicit declaration of function 'fallocate' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        can_punch_hole = fallocate(
                         ^
shm.c:302:22: error: use of undeclared identifier 'FALLOC_FL_PUNCH_HOLE'
            pool_fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 1) == 0;
                     ^
shm.c:302:45: error: use of undeclared identifier 'FALLOC_FL_KEEP_SIZE'
            pool_fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 1) == 0;
                                            ^
shm.c:432:9: error: implicit declaration of function 'fallocate' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    if (fallocate(
        ^
shm.c:434:13: error: use of undeclared identifier 'FALLOC_FL_PUNCH_HOLE'
            FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
            ^
shm.c:434:36: error: use of undeclared identifier 'FALLOC_FL_KEEP_SIZE'
            FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
                                   ^
shm.c:501:9: error: implicit declaration of function 'fallocate' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    if (fallocate(
        ^
shm.c:503:13: error: use of undeclared identifier 'FALLOC_FL_PUNCH_HOLE'
            FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
            ^
shm.c:503:36: error: use of undeclared identifier 'FALLOC_FL_KEEP_SIZE'
            FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
                                   ^
shm.c:597:9: error: implicit declaration of function 'fallocate' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    if (fallocate(
        ^
shm.c:599:13: error: use of undeclared identifier 'FALLOC_FL_PUNCH_HOLE'
            FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
            ^
shm.c:599:36: error: use of undeclared identifier 'FALLOC_FL_KEEP_SIZE'
            FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
                                   ^
This commit is contained in:
Jan Beich 2021-01-19 15:22:51 +00:00 • committed by Daniel Eklöf
parent 6626ef5807
commit 93fd77e01b
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
1 changed files with 7 additions and 1 deletions
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8
shm.c
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@ -299,7 +299,7 @@ shm_get_buffer(struct wl_shm *shm, int width, int height, unsigned long cookie,
if (!can_punch_hole_initialized) {
can_punch_hole_initialized = true;
#if defined(__x86_64__)
#if defined(__x86_64__) && defined(FALLOC_FL_PUNCH_HOLE)
can_punch_hole = fallocate(
pool_fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 1) == 0;
@ -410,6 +410,7 @@ shm_can_scroll(const struct buffer *buf)
#endif
}
#if defined(FALLOC_FL_PUNCH_HOLE)
static bool
wrap_buffer(struct wl_shm *shm, struct buffer *buf, off_t new_offset)
{
@ -642,12 +643,14 @@ err:
abort();
return false;
}
#endif /* FALLOC_FL_PUNCH_HOLE */
bool
shm_scroll(struct wl_shm *shm, struct buffer *buf, int rows,
int top_margin, int top_keep_rows,
int bottom_margin, int bottom_keep_rows)
{
#if defined(FALLOC_FL_PUNCH_HOLE)
if (!shm_can_scroll(buf))
return false;
@ -655,6 +658,9 @@ shm_scroll(struct wl_shm *shm, struct buffer *buf, int rows,
return rows > 0
? shm_scroll_forward(shm, buf, rows, top_margin, top_keep_rows, bottom_margin, bottom_keep_rows)
: shm_scroll_reverse(shm, buf, -rows, top_margin, top_keep_rows, bottom_margin, bottom_keep_rows);
#else
return false;
#endif
}
void